public (string, Widget) CreateCustomActionsEntry()
{
var entry = new Entry();
entry.PlaceholderText = "Search";
entry.SetIconFromIconName(EntryIconPosition.Primary, "edit-find-symbolic");
entry.SetIconFromIconName(EntryIconPosition.Secondary, "edit-clear-symbolic");
entry.IconRelease += (o, args) =>
{
switch (args.P0)
{
case EntryIconPosition.Primary:
ApplicationOutput.WriteLine(o, "Clicked Search Icon");
break;
default:
entry.Text = string.Empty;
ApplicationOutput.WriteLine(o, "Clicked Clear Icon");
break;
}
};
return("Custom actions entry:", entry);
}
public (string, Widget) CreateSimpleButton()
{
var btn = new Button("Simple Button");
btn.Clicked += (sender, e) => ApplicationOutput.WriteLine(sender, "Clicked");
return("Simple button:", btn);
}
public (string, Widget) CreateStockButton()
{
var btn = new Button(Stock.About);
btn.Clicked += (sender, e) => ApplicationOutput.WriteLine(sender, "Clicked");
return("Stock button:", btn);
}
public (string, Widget) CreateLinkButton()
{
var btn = new LinkButton("A simple link button");
btn.Clicked += (sender, e) => ApplicationOutput.WriteLine(sender, "Link button Clicked");
return("Link button:", btn);
}
public (string, Widget) CreateHorizontalRange()
{
var adj = new Adjustment(0.0, 0.0, 101.0, 0.1, 1.0, 1.0);
var hScale = new HScale(adj);
hScale.SetSizeRequest(200, -1);
hScale.ValueChanged += (sender, e) => ApplicationOutput.WriteLine(sender, $"Value Change: {((HScale)sender).Value}");
return("Horizontal", hScale);
}
public (string, Widget) CreateSwitchButton()
{
var btn = new Switch();
btn.ButtonReleaseEvent += (o, args) =>
ApplicationOutput.WriteLine(o, $"Switch is now: {!btn.Active}");
return("Switch:", btn);
}
public (string, Widget) CreateVerticalRange()
{
var adj = new Adjustment(0.0, 0.0, 101.0, 0.1, 1.0, 1.0);
var vScale = new VScale(adj);
vScale.SetSizeRequest(-1, 200);
vScale.ValueChanged += (sender, e) => ApplicationOutput.WriteLine(sender, $"Value Change: {((VScale)sender).Value}");
return("Vertical", vScale);
}
public (string, Widget) CreatePlaceholderEntry()
{
var entry = new Entry();
entry.PlaceholderText = "Please fill with information";
entry.Changed += (sender, e) => ApplicationOutput.WriteLine(sender, "Changed");
return("Placeholder text entry:", entry);
}
public (string, Widget) CreateSimpleRightAlignedTextEntry()
{
var entry = new Entry("Text is Right Aligned");
entry.Xalign = 1f;
entry.Changed += (sender, e) => ApplicationOutput.WriteLine(sender, "Changed");
return("Right aligned text entry:", entry);
}
public (string, Widget) CreateSimpleEntry()
{
var entry = new Entry("Initial Text");
entry.TooltipText = "This is the tooltip!";
entry.Changed += (sender, e) => ApplicationOutput.WriteLine(sender, "Changed");
return("Simple entry:", entry);
}
public (string, Widget) CreateImageButton()
{
var btn = new Button();
btn.AlwaysShowImage = true;
btn.Image = Image.NewFromIconName("document-new-symbolic", IconSize.Button);
btn.Clicked += (sender, e) => ApplicationOutput.WriteLine(sender, "Clicked");
return("Image button:", btn);
}
public (string, Widget) CreateMaxLimitEntry()
{
var entry = new Entry("123");
entry.MaxLength = 3;
entry.Changed += (sender, e) => ApplicationOutput.WriteLine(sender, "Changed");
return("Text length limited entry:", entry);
}
protected override void OnPressed()
{
base.OnPressed();
var seat = Display.DefaultSeat;
ApplicationOutput.WriteLine($"Default seat: {seat}");
seat.Pointer.GetPosition(null, out int x, out int y);
ApplicationOutput.WriteLine($"Position: ({x}, {y})");
}
public (string, Widget) CreateImageTextButton()
{
var btn = new Button();
btn.Label = "Some text";
btn.ImagePosition = PositionType.Top;
btn.AlwaysShowImage = true;
btn.Image = Image.NewFromIconName("document-new-symbolic", IconSize.Button);
btn.Clicked += (sender, e) => ApplicationOutput.WriteLine(sender, "Clicked");
return("Image and text button:", btn);
}
public (string, Widget) CreateInvisibleCharEntry()
{
var entry = new Entry("Invisible text entry");
entry.Visibility = false;
entry.InvisibleChar = '\u2022';
entry.InvisibleCharSet = true;
entry.Changed += (sender, e) => ApplicationOutput.WriteLine(sender, "Changed");
return("Invisible text entry:", entry);
}
public (string, Widget) CreateActionButton()
{
var sa = new GLib.SimpleAction("SampleAction", null);
sa.Activated += (sender, e) => ApplicationOutput.WriteLine(sender, "SampleAction Activated");
Program.App.AddAction(sa);
var btn = new Button();
btn.Label = "SampleAction Button";
btn.ActionName = "app.SampleAction";
return("Action button:", btn);
}
protected override void OnPressed()
{
base.OnPressed();
var count = 0;
if (running)
{
running = false;
return;
}
var startmem = GC.GetTotalMemory(true);
var testfile = "Textpic.png";
using var teststream = typeof(ImageSection).Assembly.GetManifestResourceStream("Testpic");
using (var writeTestFile = new FileStream(testfile, FileMode.Create)) {
teststream.CopyTo(writeTestFile);
}
using (var heatup = new Pixbuf(testfile)) {
ApplicationOutput.WriteLine($"{nameof(heatup)}.{nameof(Pixbuf.ByteLength)}\t{heatup.ByteLength:N0}");
}
startmem = GC.GetTotalMemory(true);
ApplicationOutput.WriteLine($"{nameof(GC.GetTotalMemory)} at start: {startmem:N}");
running = true;
var memAllocated = 0UL;
while (running)
{
using (var source = new Pixbuf(typeof(ImageSection).Assembly, "Testpic")) {
memAllocated += source.ByteLength;
count++;
}
DispatchPendingEvents();
if (!running)
{
break;
}
}
var endmem = GC.GetTotalMemory(true);
ApplicationOutput.WriteLine($"Leak:\t{(endmem - startmem):N0}\t{nameof(memAllocated)}");
ApplicationOutput.WriteLine($"{nameof(GC.GetTotalMemory)} at start: {startmem:N0}\tat end: {endmem:N0}\t{nameof(Pixbuf)} created: {count}");
}
public (string, Widget) CreateSpinButton()
{
// Spinbutton constructor takes MinValue, MaxValue and StepValue
var btn = new SpinButton(0, 1000, 1);
// Button constructor also takes the adjustment object
// and it can be redefined any time like CurrentVal, MinVal, MaxVal, Step, PageStep, PageSize
btn.Adjustment.Configure(888, 0, 1000, 1, 100, 0);
// Default values are double, use ValueAsInt method to get Int
btn.ValueChanged += (sender, e) =>
ApplicationOutput.WriteLine(sender, $"Spin button changed: {btn.ValueAsInt}");
return("Spin button:", btn);
}
public (string, Widget) CreateToggleButton()
{
var btn = new ToggleButton("Toggle Me");
btn.Toggled += (sender, e) =>
{
if (btn.Active)
{
btn.Label = "Untoggle Me";
}
else
{
btn.Label = "Toglle Me";
}
ApplicationOutput.WriteLine(sender, "Buton Toggled");
};
return("Toggle button:", btn);
}
public (string, Widget) CreateMultiColumnComboBox()
{
// create a store for our combo
var store = new ListStore(typeof(string), typeof(string), typeof(bool));
// lets append some stock icons, passing the icon names, and a simple text column
store.AppendValues("dialog-warning", "Warning", true);
store.AppendValues("process-stop", "Stop", false);
store.AppendValues("document-new", "New", true);
store.AppendValues("edit-clear", "Clear", true);
// create cells
var imageCell = new CellRendererPixbuf();
var textCell = new CellRendererText();
// create the combo and pass the values in
var combo = new ComboBox(store);
combo.PackStart(imageCell, true);
combo.PackStart(textCell, true);
// add combo attributes to show in columns
combo.AddAttribute(imageCell, "icon-name", 0);
combo.AddAttribute(textCell, "text", 1);
// lets use the store bool values to control sensitive rows
// Process-stop (store index one) should be disabled in this sample
// For a ComboBox item to be disabled, all cell renderers for the item need to have
// their sensitivity disabled
combo.AddAttribute(imageCell, "sensitive", 2);
combo.AddAttribute(textCell, "sensitive", 2);
// listen to index changed on combo
combo.Changed += (sender, e) =>
ApplicationOutput.WriteLine(sender, $"Index changed to:{((ComboBox)sender).Active}");
// lets preselect the first option
combo.Active = 0;
return("Combo with Icons and Text:", combo);
}
public (string, Widget) CreateSimpleComboBox()
{
// initialize with a simple string list
var combo = new ComboBox(
new string[]
{
"Combo Entry 1",
"Combo Entry 2",
"Combo Entry 3",
"Combo Entry 4"
}
);
// event to notify for index changes in our combo
combo.Changed += (sender, e) =>
ApplicationOutput.WriteLine(sender, $"Index changed to:{((ComboBox)sender).Active}");
// set the active selection to index 2 (Combo Entry 3)
combo.Active = 2;
return("Simple combo:", combo);
}
